Abrading machine



Novel 7', 1925.

w. D'. KMENTT ABRADING MACHINE Filed Jan. 16, 1922 2 sheets-sheet 1 In fen im@ g2/fly.

Patented Nov'. 17, 1925. i

UNITI-:Dl STATES f 1,561,361 vPATENT OFFICE.

W'ALl'JEll/[AIR' D. KMENT'I, OF'ARON, OHIO, ASSIGNOR TO THE B. F. GOODRICH 'COM- PANY, OF NEW YORK, N. Y., A CORPORATION OF NEW 'YORIL ABRADING MACHINE.

Application filed January 16, 1922. Serial No. 529,423.

To a7] whom it may concern.'

Be it known that I, ALDEMAR D. Kamari', a citizen of the'United States, residing' at Akron,.in the county of Summit and State of Ohio, llave invented a certain new and useful Abrading Machine, ot which the following is a specilication.

This invention relates to' abr-ailing ma rhines, and its general object is to provide 4an improved machine for abrading an article, throughout a considerable surface arez, to a substantially uniform depth, or to a desired surface contour. l\ more speciic object is to provide agrapid. accurate and dependable machine for abrading' an article of annular form, as in the case of butiing' oli the over-cured surface o't' the rubber bags'eommonly used as expansible cores in vulcanizing certain types oi pneumatic tires, such bufilng being desirable, 'foircxampld as a preliminary to re-covering the bags for further useas described in U. S. Patent No. 1,452,326, issued April 17, 1923. upon 'an application of James D. Tew. I do not claim to be the inventor of the subject matter of said patent. Ot' the iacconipanyine` drawings:

Fig. 1 is a side elevation. with parts broken away and in section, of a. bag-billing machine embodying' and adapted to carry ont a. preferred form ot` my invention, with the workin place.

Fig'. 2 is a plan view of the same, with parts broken away` and 1n section.

Figa 3 '1s a fragmentary plan lview on a larger scale of the wor -holdimg.r chuck, with the work mounted thereon, showing,r certain parts in section. l v

Fig. 4 is a side View of t-heabrading Wheel and a shield therefor, a part of the shield being broken away.

Fig'j is a horizontal o1 Fig. 1. I l

Referring to the drawings, 10 is a table section on line v5-5 upon which is mounted a journal-bracket 11, in which 1s mounted a horizontal shaft 12, disposed transversely of the table, and provided at'its rear end with a` pulley 13 driven by a belt 14 and at its front end with aV work-holding chuck 15. Said chuck eomprisesv a disc 16 (Figr) upon which is secured an inner rim member 17 by means of screws, one of which is shown at 18,the outer periphery of said inner rim member being, formed at intervals with transverse (Figa 1) of the water-bag.

grooves, one of which is sh'owlrat 19, ex-

tending from its front face slightly past its middle plane, said grooves being adapted to receive studs, one of which is shown at 20, (Fig. 3), extendingfrom the-nner periphery ot' a detachable outer"rim-member 21, the ends of said grooves limiting the rearward axial movement of said outer rim.

lThe outer face of the outer rim member 21'is cylindrical. andof such diameter as to receive. preferablyv under more or less tension. the work 22, here shown as a rubber bag` such as is commonly used as an eX- pansible core for tires and referred to as a water-1mg. At the rear side of said cylindrical outer surface, the detachable outer rim member 21 is provided with a circumferential flange 23 to limit the rearward axial movement of the wo'rk upon said rim member. 24 is` an annular clamping' plate formed with eircumferentially disposed locking' slots 25. 25, flanked by inclined cam surfaces 25, 25, said slots being 'adapted to receive headed stud 'bolts 26, 26, extending from the front. face of tlie inner rim 17 for holding' said clamping; plate toward said inner rim with its outer margin pressing' on the work, as indicated at 27 (-Fio. 3) and thereby holdinn` the work upon the detachable rim 21 and the latter upon the inner rim 17. The outer and inner rim and the. disc 16 are appropriately cut through to accommodate the. valve stem 28 n The clamping plate 24 .is provided with a diametric handle 2,9 to facilitate its attachment to and removal from the chuck,'these operations requirinoj, with the construction here shown` a circumferential movement of 'the plate relative to the chuck. I do not wholly limit my claims, however, to the specific means here shown for securing and rotating the work.

The mountingr for the abradinq wheel` which latter is designated bv the numeral 30. comprises a Supporting member 31 adiustably secured upon the table 10 bv means of clamping bolts 32, 32. mounted in slots 33. 33, in said table, said sup'oortine' member thus beim; adapted to be adiusted from and toward the chuck 15.

The supportingmember 31 is formed with ai circular track-wav 3 4 on its upper face for a supporting roller 35 iournaled on a oarriag'e 36, the latter being pivoted on the member 31 at 37, concentrically with respect to said track-way. The carriage 36 is provided at its top with an upstanding circular flange 38 upon which rests a turntable 39 formed with a downwardly extending flange 40 rotatably fitting within the flange 33, 41 is a pivot pin rotatably mounted in a part of the carriage 36 and threaded into the bottom of the turn-table 39, which latter is thus pivoted concentrically with respect to the flanges 38, 40. The upper side of the turntable is formed with a dove-tail guide 42 upon which is mounted a slide 43. 44 is a feedscrew, swiveledin a bracket 45 on the turn-table, threaded through a part of the slide 43, and provided with a hand-wheel 46, for adjusting said slide 43 on the turntable'39. f

The slide 43 is provided with a bearing bracket 47, for the shaft 448 of the abrading wheel 30 and 49 is a motor mounted on said slide for driving said shaft.

The abrading wheel 30 is provided with a guard 50 secured within a segmental stirruplike member 51. which latter, if desired, may be secured against turning with respect to the'bracket 47 by any known or suitable means. 52 is a handle upon the member 51, for turning the turn-table 39 about its pivot pin 41 to hold the abrading wheel against the work.

Iny the operation of the device the clamping plate 24 is unlocked from the chuck 15 26 may pass freely through the large ends of the slots 25, and removed from said chuck. If a water-bag of a new Size is to be bui'ed, the outer rim member 21 is pulled'forward off the inner rim member 17, the studs 2O sliding in the grooves 19, and is substituted by another outer rim member of proper outer diameter for the new work. For work of extremely large or small size an inner rim member of different outer diameter may also be substituted for the inner rim member 17. V p

The work is mounted upon the outer rim member, and the clamping plate 24 replaced to hold it thereon. The carriage-supporting member 31 is then adjusted upon the table 10 to bring the pivotal axis 37 of the carriage 36 substantially under the center of the segment of the worlrupon which the abrading wheel is to operate, and the carriage is then secured by means of the clamplng bolts 32. The slide 43 is then adjusted on the turn-table 39, by means of the handwheel 46, to bring the abrading wheel 30 into proper-operative position with respect to the work. Power is applied through the belt 14 to rotate the' work, preferably counter-clockwise, as viewed in Fig. 1, so that it moves upward past the abrading wheel, while the latter is driven by the motor 49, preferably clockwise, as viewedv from the motor, so that theabraded particles are thrown downward, the contacting surfaces of the work and of the abrading wheelthus moving in opposite directions, and the latter preferably at the greater peripheral speed. l

The abrading' wheel is held against the work by means of the handle 52, abrading a circumferential zone 'about the work, as the latter revolves, and the abraded zone is gradually extended laterally around the work by turning the carriage 36 about its pivot 37.

By adjustment of the slide. 43 upon the turn-table'39, either the middle part of the .j abrading face of the wheel, or a corner thereof, may be presented to the surface of the water-bagl as the abrading wheel moves about the arcuate crown of the latter, and by such adjustment, combined with adjustment of the turn-table -or the carriage, or both, the

'by driving the slide, in carrying the abrading operation toward or from the inner periphery of the core, as this movement is simpler andpermits the abrading wheel to be held inproper angular relation to the Work. Theseveral members of the supporting structure'for the abrading wheel, while holding the latter against displacement by the tractive force of the work,'are so joinedv with each other as to perm'iti-,t-,he wheel -t'o be' presented to anypart of thef'cross-section;- of the work andata chosen or variable rlhe several adjustments 'or movements of l the carriage, turn-table and v'slide may readily be effected by manipulation of the handle 52 and the hand wheel 46, they being on opposite sides of the pivotal axis of theturn-table. The apparatus may be of strong construction and yet susceptible of very minute adjustment and accurate control. `It is highly effective, easily operated, and may readily be' adapted to work upon articles of diderent size or shape.

By continuously rotating the core so as to first buff a narrow, annular, longitudinal 4zone upon the bag, and then moving' the abrading wheel transversely about the work to broaden said abraded zone, it is possible, notwithstanding the flexible character of the bag, to abrade it to substantially the same deptlithroughout its longitudinal circum` lference, at a given part of its cross-section,

so that When the abrading operationv is completed the bag will be of substantially the same cross-sectional contour throughout.

Thus by taking care to abrade the bag to a desired cross-sectional contour at one circumterential point it is abraded to substantially the same contour throughout its longitudinal circumference. l

Modifications maybe resorted- Q Without departing from the sco'pe of my invention,

and I do not wholly limit my claims to, the

specific construction shoWn.

.I claim:

l. Apparatus for buliing an annular,.rub ber tire-core, said apparatus comprising means adapted to support and rotatesaid core upon a lined axis, said means so iitting Within the core as substantially to tension the sa an abrading wheel, andia support for saidabradingfwlieel adapted tobe swung transversely about the Work.

2. Apparatus for b'utling an annular, flexi-v ble, rubber article, said -apparatus comprising power driven means tor rotatably supporting said article, said means engaging lar article, the combination. of means forv supporting' said' article and rotating it in its oivn plane upon a fixed axis, an abrad.

.ing member, and means for supporting said abrading member and moving it transversely around. the contour of the work, the last said means comprising a support adapted to be swung about an aXis substantially vtangent to the work and a second support pivoted on the first said support for movement of ithe abrading member trom and toward the Work.

l. A machine defined in claim 8 in which the pivoted [axes iof the two supports are parallel.

In anabrading machine oran annular article, the combination of means for support-ing sa-id article and rotating it in its own plane upon a lined axis, an abrading` inember. and means-for supporting said abrading member and moving it transversely around the contour oi the Work, the last said means comprising a series of three superposed supports, tWo of the saine being pivotally mounted and vthe other4 being slidably mounted.

G. In an abrading machine for an annular'article the combination of means for `supportingv said article and rotating it in its own plane.v an abrading member, a 'carriage therefor so mounted to be oscillated about a segment ot said article upon vihicli said abrading member operates, a member pivoted on said carriage, and a. support for said abrading member slidably mounted on said pivoted member.

7. In an abradiiig machine for an annular article the combination of a chuck comprising-an .inner rim member, a detachable outer rim member mounted thereon and adapted to receive the work, means for driving said chuck, an abradingil member, a carriage there for so mounted as to be movable about a segment ot' the work, and an adjustable support for said carriage.

8. In apparatus ol' the character described, a chuck comprising an inner rim member, an outer rim member detachably mounted thereon and adapted to receive the Work, means on said outer rim member for limiting` the axial movement of .the ivork in one direction thereon, and, a quick detachablev clamping plate adapted to press the Work. againstsaid limiting means, in combination with means for supporting and rotating said chuck,v an abrading tool, and supporting means vtherefor adapted vto be moved transversely about Ithe. contour ot' an annular article mounted upon said chuck.

9. In apparatus of the character described, a.' chuck comprising an inner rim member, an outer rim member mounted thereon and adapted to receive the work, means for limiting the axial movement of said outer rim member on said inner rimmember in one direction, means on said outer rim-member for'limiting the axial movement fot the'work in said direction, and a'quick detachable clamping plate for preventing displacement of the work and of said outer rim-member in `the opposite direction, in combination ivith means for suppOrt-ing'and rotating said chuck, an abi'ad-ing tool, and supporting means therefor adapted to .be moved transversely about the contourof an annular article mounted upon said chuck. i

10; An ab 'ading machine comprising lmeans for supporting the work, a carriage so mounted as to be movable in an are about the Work,- an abradi'ng wheel, and a bearing member thereior slidably and pivotally lmounted on said carriage.

ll. An abrading machine comprising means i'oi' supporting the Work, a carriage adapted to be oscillated about the Work, a pivoted structure mounted on said carriage,

-an abrading wheel mounted on said pivoted structure, and handles on said pivoted struc- -ture on opposite sides of the latters pivotal axis.

12. An abrading machine comprising means forsupporting the Work, a carriage `so mounted as to be movable about the Work,

through the`axis of the rotary'support per-l pendicularto the axis of said arm, and a rotary bufiing wheel supported by said arm. 14. Apparatus for the purpose described,

comprising a support .for an air bag 'jour- 'naled to rotate about a horizontal axis, an arm having an offset upper portion, a sup,- port upon which said arm is pivoted to swing about a vertical axis, means for imparting rectilinear movement to said support, a buinp; Wheel carrie-r mounted at the` upper end of said arm, means for imparting rectilinear movement to said' buing Wheel carrier, and a bu'fing Wheel rotatably mounted on said carrier with means for operating it. p

15. In combination. a rotary chuck for an air bag, a horizontally adjustable member, an arm having one end pivoted to said member on an axis perpendicular to the axis of said chuck, anti-friction bearings Afor said forimparting rectilinear movement to said I support in a plane parallel to the axis of the chuck, said arm having its other end offset from its pivot, a buffing' wheel supported by said arm u *ith means for operating it, and

means for adjusting said buiifingl Wheel on said pivoted arm.`

17. In combination, a rotar)vv chuck for an airbag journaled upon a horizontal shaft, a

slide member with means formparting rectilinear movement thereto in a horizontal plane, an arm having an oiiset end, a slide member carried by said offset end with means for imparting movement thereto in a horizontal plane, a butfing Wheel supported 'by said last named slide member, and means for moving said slide member.

ln Witness whereof I have hereunto set my hand this 13th day of J anuarv` 1922.

VVALDEMAR D. KMENTT. 

